The Applied Computational Electromagnetics Society Journal最新文献

Fast Range Decoupling Algorithm for Metamaterial Aperture Real-time Imaging 超材料孔径实时成像的快速距离解耦算法

The Applied Computational Electromagnetics Society Journal Pub Date : 1900-01-01 DOI: 10.47037/2021.aces.j.360802

Chenjiang Guo, Yuteng Gao, W. Peng, Min Wang, Jun Ding

引用次数: 1

Time-dependent Schrödinger Equation based on HO-FDTD Schemes 基于HO-FDTD格式的时间相关Schrödinger方程

The Applied Computational Electromagnetics Society Journal Pub Date : 1900-01-01 DOI: 10.47037/2021.aces.j.360803

M. Zhu, F. Huo, B. Niu

引用次数: 0

A Novel Design of Aperiodic Arrays for Ultrawideband Beam Scanning and Full Polarization Reconfiguration 一种用于超宽带波束扫描和全极化重构的新型非周期阵列设计

The Applied Computational Electromagnetics Society Journal Pub Date : 1900-01-01 DOI: 10.47037/2021.aces.j.360801

Ziyu Zhang, Jia Liu, Jianxun Su, Jiming Song

{"title":"A Novel Design of Aperiodic Arrays for Ultrawideband Beam Scanning and Full\u0000 Polarization Reconfiguration","authors":"Ziyu Zhang, Jia Liu, Jianxun Su, Jiming Song","doi":"10.47037/2021.aces.j.360801","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360801","url":null,"abstract":"─ In this letter, a multifunction aperture array is proposed for ultrawideband (UWB) scanning and polarization reconfiguration. The UWB array consisted of linearly polarized elements is capable of operating in four polarization modes (+45° linear polarization (LP), -45° linear polarization, left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP)). This work involves two essential techniques: (a) A new beam-scanning UWB array synthesis approach. An iterative convex optimization strategy is utilized to determine the element locations and obtain the minimum sidelobe level (SLL) for multiple patterns. (b) The polarization reconfigurable technique for beam-scannable arrays. In this part, a sequential rotation and excitation compensation (SR-EC) technique provides polarization reconfiguration for a beam-scannable array consisting of linearly polarized elements. A beam-scanning UWB array is designed by using the proposed UWB array synthesis approach and the SR-EC polarization reconfigurable technique. The Feko numerical result shows 0°-60° beam peak steering, a 4:1 bandwidth (1-4 GHz), and fourpolarization reconfigurability. Index Terms ─ Array synthesis, beam scanning, polarization reconfiguration, ultrawideband.","PeriodicalId":408893,"journal":{"name":"The Applied Computational Electromagnetics Society Journal","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127786289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Recovery Performance Study of Compressive Sensing Methods on Antenna Array Diagnosis from Near-Field Measurements 压缩感知方法在天线阵列近场测量诊断中的恢复性能研究

The Applied Computational Electromagnetics Society Journal Pub Date : 1900-01-01 DOI: 10.47037/2021.aces.j.360805

O. J. Famoriji, T. Shongwe

{"title":"A Recovery Performance Study of Compressive Sensing Methods on Antenna Array Diagnosis from Near-Field Measurements","authors":"O. J. Famoriji, T. Shongwe","doi":"10.47037/2021.aces.j.360805","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360805","url":null,"abstract":"─ Antenna testing consists locating the potential defaults from radiated field measurements. It has been established in literature, that compressive sensing methods provide faster results in failure detection from smaller number of measurement data compared to the traditional back-propagation mechanisms. Compressive sensing (CS) methods require a priori measurement of failure-free reference array and require small number of measurements for diagnosis. However, there are conflicting reports in literature regarding the choice of appropriate CS method, and there is no sufficient comparison study to justify which one is a better choice under a very harsh condition. In this study, recovery performance test of CS methods for the diagnosis of antenna array from few near-field measured data under various signal-to-noise ratios (SNRs) is presented. Specifically, we tested three prominent regularization procedures: total variation (TV), mixed l1 l2 ⁄ norm, and minimization of the l1 in solving diagnosis problems in antenna array. Linear system that relates the difference between near-field measured data from reference antenna (RA) array and array under test (AUT), and the difference that exist between coefficients of RA and the AUT, is solved by the three compressive sensing regularization methods. Numerical experiment of a 10 × 10 rectangular waveguide array under realistic noise scenario, operating at 10 GHz is used to conduct the test. Minimization l1 technique is more robust to additive data noise. It exhibits better diagnosis at 20 dB and 10 dB SNR, making it a better candidate for noisy measured data as compared to other techniques. Index Terms ─ Antenna array diagnosis, antenna testing, compressive sensing, near-field, low SNR.","PeriodicalId":408893,"journal":{"name":"The Applied Computational Electromagnetics Society Journal","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133021091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Performance Investigations of a Quad-band Microstrip Antenna for Body Wearable Wireless Devices 用于人体可穿戴无线设备的四波段微带天线性能研究

The Applied Computational Electromagnetics Society Journal Pub Date : 1900-01-01 DOI: 10.47037/2021.aces.j.360806

V. Karthik, T. Rao

{"title":"Performance Investigations of a Quad-band Microstrip Antenna for Body Wearable Wireless Devices","authors":"V. Karthik, T. Rao","doi":"10.47037/2021.aces.j.360806","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360806","url":null,"abstract":"─ This research work proposes a microstripbased quad-band monopole antenna for body Wearable Wireless Devices (WWD) for Wireless Body Area Network (WBAN) applications. Ultra high frequency (UHF) and Ultra wide band (UWB) technology have been known for their efficiency to meet power, size and distance considerations for WBANs. The designed antenna resonates at four frequencies, 1.8, 2.4, 5.0 and 8.9 GHz covering licensed and license-free wireless technologies. The antenna design considers the electromagnetic (EM) effects due to the interaction of body tissues with the radio frequency (RF) waves, which are very different when compared to their interaction with free space. The performance of the antenna is investigated in terms of radiation efficiency, total gain, specific absorption rate (SAR), and thermal effects (short and long term). A simplified, human body tissue layer model is used for simulations utilizing EM computations. Simulated and experimental results are paralleled and are found to be in good agreement. Index Terms ─ Microstrip antenna, quad-band, specific absorption rate, thermal effects, ultra wideband, WBAN, wearable wireless devices.","PeriodicalId":408893,"journal":{"name":"The Applied Computational Electromagnetics Society Journal","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117098655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

RK-HO-FDTD Scheme for Solving Time-dependent Schrodinger Equation 求解时变薛定谔方程的RK-HO-FDTD格式

The Applied Computational Electromagnetics Society Journal Pub Date : 1900-01-01 DOI: 10.47037/2021.aces.j.360804

Min Zhu, Yi Wang

引用次数: 0